Hi All,

When i issue "ifconfig" command in Centos 5.5, there is one extra interface is appearing, could any one please help me in removing that?

If you see the below example "__tmp1755126292" s the extra interface which i want to remove.

FYR:

[root@MT-PT-OSB1 ~]# ifconfig
__tmp1755126292 Link encap:Ethernet HWaddr 84:8F:69:81:80:79
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:222 errors:0 dropped:0 overruns:0 frame:0
TX packets:106 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:22800 (22.2 KiB) TX bytes:17882 (17.4 KiB)
Interrupt:82 Memory:da000000-da012800

eth0 Link encap:Ethernet HWaddr 84:8F:69:81:80:7B
inet addr:192.168.128.133 Bcast:192.168.128.255 Mask:255.255.255.0
inet6 addr: fe80::868f:69ff:fe81:807b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:37 errors:0 dropped:0 overruns:0 frame:0
TX packets:47 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3188 (3.1 KiB) TX bytes:8428 (8.2 KiB)
Interrupt:90 Memory:dc000000-dc7fffff







[root@MT-PT-OSB1 network-scripts]# ls -l
total 384
-rw-r--r-- 3 root root 259 Oct 26 2012 ifcfg-eth0
-rw-r--r-- 3 root root 259 Oct 26 2012 ifcfg-eth1
-rw-r--r-- 3 root root 333 Apr 7 04:41 ifcfg-eth2
-rw-r--r-- 1 root root 254 Oct 13 2010 ifcfg-lo
lrwxrwxrwx 1 root root 20 Nov 15 2011 ifdown -> ../../../sbin/ifdown
-rwxr-xr-x 1 root root 625 Oct 13 2010 ifdown-bnep
-rwxr-xr-x 1 root root 4573 Oct 13 2010 ifdown-eth
-rwxr-xr-x 1 root root 827 Oct 13 2010 ifdown-ippp
-rwxr-xr-x 1 root root 2149 Oct 13 2010 ifdown-ipsec
-rwxr-xr-x 1 root root 4473 Oct 13 2010 ifdown-ipv6
lrwxrwxrwx 1 root root 11 Nov 15 2011 ifdown-isdn -> ifdown-ippp
-rwxr-xr-x 1 root root 1481 Oct 13 2010 ifdown-post
-rwxr-xr-x 1 root root 1084 Oct 13 2010 ifdown-ppp
-rwxr-xr-x 1 root root 637 Oct 13 2010 ifdown-routes
-rwxr-xr-x 1 root root 1593 Oct 13 2010 ifdown-sit
-rwxr-xr-x 1 root root 913 Oct 13 2010 ifdown-sl
-rwxr-xr-x 1 root root 1074 Oct 13 2010 ifdown-tunnel
lrwxrwxrwx 1 root root 18 Nov 15 2011 ifup -> ../../../sbin/ifup
-rwxr-xr-x 1 root root 13427 Oct 13 2010 ifup-aliases
-rwxr-xr-x 1 root root 859 Oct 13 2010 ifup-bnep
-rwxr-xr-x 1 root root 10798 Oct 13 2010 ifup-eth
-rwxr-xr-x 1 root root 12033 Oct 13 2010 ifup-ippp
-rwxr-xr-x 1 root root 8078 Oct 13 2010 ifup-ipsec
-rwxr-xr-x 1 root root 10853 Oct 13 2010 ifup-ipv6
-rwxr-xr-x 1 root root 823 Oct 13 2010 ifup-ipx
lrwxrwxrwx 1 root root 9 Nov 15 2011 ifup-isdn -> ifup-ippp
-rwxr-xr-x 1 root root 727 Oct 13 2010 ifup-plip
-rwxr-xr-x 1 root root 954 Oct 13 2010 ifup-plusb
-rwxr-xr-x 1 root root 2369 Oct 13 2010 ifup-post
-rwxr-xr-x 1 root root 4298 Oct 13 2010 ifup-ppp
-rwxr-xr-x 1 root root 1707 Oct 13 2010 ifup-routes
-rwxr-xr-x 1 root root 3662 Oct 13 2010 ifup-sit
-rwxr-xr-x 1 root root 1675 Oct 13 2010 ifup-sl
-rwxr-xr-x 1 root root 2078 Oct 13 2010 ifup-tunnel
-rwxr-xr-x 1 root root 3325 Oct 13 2010 ifup-wireless
-rwxr-xr-x 1 root root 5433 Oct 13 2010 init.ipv6-global
-rwxr-xr-x 1 root root 1154 Oct 13 2010 net.hotplug
-rw-r--r-- 1 root root 10363 Oct 13 2010 network-functions
-rw-r--r-- 1 root root 39833 Oct 13 2010 network-functions-ipv6

Initially there are 3 interfaces, the naming is wrong for one of the interface "__tmp1755126292"
Sample configuration:-
Open the eth1/eth2 and verify which one with "DEVICE=__tmp1755126292"
if you dont want extra interface then open both configuration and change "ONBOOT=no"

Now also there are 3 interfaces but i didnt mention all.
All the device names are proper.

FYR

[root@MT-PT-OSB1 network-scripts]# cat ifcfg-eth0
# Please read /usr/share/doc/initscripts-*/sysconfig.txt
# for the documentation of these parameters.
[root@MT-PT-OSB1 network-scripts]# cat ifcfg-eth0
# Please read /usr/share/doc/initscripts-*/sysconfig.txt
# for the documentation of these parameters.
TYPE=Ethernet
DEVICE=eth0
HWADDR=84:8f:69:81:80:6b
BOOTPROTO=none
NETMASK=255.255.255.0
IPADDR=192.168.128.133
ONBOOT=yes
USERCTL=no
IPV6INIT=no
PEERDNS=yes
[root@MT-PT-OSB1 network-scripts]# cat ifcfg-eth1
# Please read /usr/share/doc/initscripts-*/sysconfig.txt
# for the documentation of these parameters.
TYPE=Ethernet
DEVICE=eth1
HWADDR=84:8f:69:81:80:6d
BOOTPROTO=none
NETMASK=255.255.255.0
IPADDR=192.168.128.134
ONBOOT=yes
USERCTL=no
IPV6INIT=no
PEERDNS=yes
[root@MT-PT-OSB1 network-scripts]# cat ifcfg-eth2
# Please read /usr/share/doc/initscripts-*/sysconfig.txt
# for the documentation of these parameters.
DEVICE=eth2
GATEWAY=56.4.200.1
TYPE=Ethernet
BROADCAST=56.4.200.255
HWADDR=84:8f:69:81:80:66
BOOTPROTO=none
NETMASK=255.255.255.0
NETWORK=56.4.200.0
IPADDR=56.4.200.1
ONBOOT=yes
USERCTL=no
IPV6INIT=no
IPV6_AUTOCONF=no
PEERDNS=yes

what is your loopback configuration?

Sorry, I didnt get you

I am doing weblogic upgradation. When i was running script for upgrade it was saying "invalid network interface list", when i checked i found one extra interface "__tmp1755126292". As of now i did "ifconfig __tmp1755126292 down". now script is working fine.

But still i dont know how that extra interface is appearing

check the loopback interface configuration